harder



2 SheetsSheet 1.

(N0 Model.)

A. HARDER.

TORSION PENDULUM CLOCK.

Patented Dec. 12. 1882.

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(No Model.) 2 sheets -Sheet 2.

A, HARDER.

TORSION PENDULUM CLOCK.

No. 269,052. Patented De0.12, 1882.

N. PETERS. PnnhrLilhngraphan Wnhmgkm, D, c.

PATENT OFFICE.

ANTON HARDER, OF RANSEN, PRUSSIA, GERMANY.

TORSION-PENDULUM CLOCK.

SPECIFICATION forming part of Letters Patent No. 269,052, dated December 12, 1882.

Application filed July 18,1882. (X model.) Patented in Austria-Hungary August 17, 1880, No. 16,111 and No. 9,591.

To all whom it may concern:

man Empire, have invented certain new and useful Improvements in Clocks, whereby the horizontally-arranged pendulum rotates alternately in each direction, and which only require winding up oncea year, oncein ten years, or a still longer period, (for which I have obtained a patent in the Austro-Hungarian Einpire, N0.,.16,11l and No. 2,591. hearing date August 17, 1880,) of which the following is a specification.

My invention relates to improvements in clocks having torsion-pendulums; and the invention consists in the peculiar connection of the weight to the spring-pendulum, and also in the peculiar means for communicating the moti'on of said pendulum to the 'escapement and gearing. I The said pendulum is suspended or attached to a steel spring of such breadth, thickness, and strength that the requisite torsion is attained, so that when the pendulum is once set in motion it continues to revolve alternately to the right or left in such manner that the escapcment-wheel of a clock or timepiece is kept in correct gear with the anchor or other like mechanism.

Figure 1 is the front elevation of a clock or' time-piece constructed according to my invention, with the dial and front plate removed. Fig. 2 is a side view of the same. Fig. 3 is a top view or plan. Fig. at shows the details of the clock mechanism or gear-train with the anchor and escapement wheel, which are all set in motion through the revolutions of the pendulum and the torsion of the pendulumspring. Fig. 5 is a side view, and Fig. 6 a top view, of Fig. 4. Fig. 7 is a modification.

A is the front plate, and B is the rear plate, of the case, which said plates also act'as bearings for the spindles of the clock-work or train of wheels.

G O is the pendulum, of circular or other appropriate form, and which consists preferably of a circular plate or disk of brass or other suitable metal, which said plate is riveted or otherwise attached to a ring of like metal, 0. A stud or pin of metal, a, is screwed or otherwise attached to the center of the disk 0. This stud a is provided at the upper end with a suitable fork-like opening, a, to receive the clamp Z), to which the torsion-spring I) is rigidly attached; or thejaws of the clamp can be somewhat longer and the torsion-spring b clamped firmly between the two cheeks of the same by means of suitable screws.

D D are two small weights, of brass or other suitable metal, which are provided with studs or projections d d, which said studs are bored and threaded to receive the threaded parts of the screw-spindle E, which said spindle passes also through the stud or projection a. Each end of the screw-spindle E is squared to receive a key, so that the said weights can be adjusted on the said spindle.

Fig. 7 shows a modification of the said stud a, whereby the fork-like opening is prolonged, so that the lower partof the same forms a hearing for the screw-spindle E E. Instead of making the spindle of one piece, as described above, I employ two small screw-spindles, which are each provided with a suitable flange, which fits so into a recess in the stud a that the said screw-spindles can be caused to revolve. In this manner each weight can be adjusted separately.

Connected to the spring I) near its upper end is a forked lever, 0, between the rear end of which and an outer plate, 0, the torsion-spring is clamped by a set-screw, as shown in Fig. 2. At the rear end this forked lever is connected, preferably by a ball-and-socket joint, to the stem gof the anchor h. The lever is thus free to move horizontally, and it is evident that the twisting motion of the spring b will be communicated through such lever to the stem of the anchor, which will thereby rock on its pivot f, to operate in connection with the escape-inent-wheel t in the ordinary manner.

The bracket (1, which is preferably screwed ontothe back plate of the case or open framework, and the horizontal arm of which said bracket is provided with a slit to permit the insertion of the spring b,and consequently the suspension of the pendulum, is preferably made of like metal with the other parts. The extreme upper end of the torsion-spring is securely fixed in the clamping device 0, which rides on the upper surface of the bracket-arm, and is so arranged that by loosening the clamping-screws the clamping-plate can be withdrawn and the torsion-spring I) adjusted. If

desired, the clamping device 0 can be rigidly connected to the bracket-arm, or can be held in position by means of a small screw,as shown in the accompanying drawings.

The escapement-wheel t is, as is customary in clocks or time'pieces of similar construction, keyed to the spindle k, the pinion of which gears into one of the toothed Wheels of the mechanism, from whence the revolution of the escapement-wheel is transmitted to the entire clock-work.

The number of wheels employed in the clockwork can be varied accordingto requirements-- that is, if the clock is only required to run eight days, only two toothed Wheels are necessary, whereas four wheels and corresponding pinions are sufficient to enable the time-piece to run one year without being wound up a second time.

The same construction can be employed for clocks or time-pieces of any desired size and in most various terms, and can be used with equal advantage and like good results from a small table time-piece to a tower-clock.

Having now described my said invention of improvements in clocks,whereby the horizontally-arranged pendulum rotates alternately in each direction, and which only require winding up once a year, or once in ten years, or a still longer period, I desire it to be understood that Ido not confine myselfto the number of wheels or piuions employed in the train of gearing or to the special form of the escapement-wheel and anchor, as these can be varied without departing from the tenor of my invention.

What 1 desire to claim and secure by Letters Patent is-- 1. In a clock, the pendulum consisting of the disk 0, the stud (1, having the slot a, the clamps b, torsion-spring I), and the lever 0, connected to the upper end of said torsionspring, and also to the stem of the anchor and escapement-wheel, as described.

2. The combination, with the torsion-spring b, of the forked lever c, clamped to the said spring, the stem g of the anchor, secured to the forward end of such lever, and adapted to receive a rocking movement on the pin f by means of a torsional movementof said spring, substantially as described.

A NTON IIALDER.

\Vitnessrs:

FRlEDRICH KNISPEL, HERMANN DEUSHER. 

